Class Occurrences<A>

java.lang.Object

com.jnape.palatable.lambda.functions.builtin.fn1.Occurrences<A>

Type Parameters:

A - the Iterable element type

All Implemented Interfaces:

Fn1<Iterable<A>, Map<A,Long>>, Applicative<Map<A,Long>, Fn1<Iterable<A>, ?>>, Cartesian<Iterable<A>, Map<A,Long>, Fn1<?,?>>, Cocartesian<Iterable<A>, Map<A,Long>, Fn1<?,?>>, Contravariant<Iterable<A>, Profunctor<?, Map<A,Long>, Fn1<?,?>>>, Functor<Map<A,Long>, Fn1<Iterable<A>, ?>>, Profunctor<Iterable<A>, Map<A,Long>, Fn1<?,?>>, Monad<Map<A,Long>, Fn1<Iterable<A>, ?>>, MonadReader<Iterable<A>, Map<A,Long>, Fn1<Iterable<A>, ?>>, MonadRec<Map<A,Long>, Fn1<Iterable<A>, ?>>, MonadWriter<Iterable<A>, Map<A,Long>, Fn1<Iterable<A>, ?>>

public final class Occurrences<A>
extends Object
implements Fn1<Iterable<A>, Map<A,Long>>

Given an Iterable<A>, return a Map<A, Long> representing each unique element in the Iterable paired with its number of occurrences.

Field Summary

Fields

Modifier and Type	Field	Description
private static final Occurrences<?>	INSTANCE

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Occurrences()

Method Summary

Modifier and Type	Method	Description
Map<A,Long>	checkedApply(Iterable<A> as)	Invoke this function with the given argument, potentially throwing any Throwable.
static <A> Occurrences<A>	occurrences()
static <A> Map<A,Long>	occurrences(Iterable<A> as)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Fn1

andThen, apply, carry, cartesian, censor, choose, cocartesian, compose, contraMap, diMap, diMapL, diMapR, discardL, discardR, flatMap, fmap, lazyZip, listens, local, pure, self, thunk, toFunction, trampolineM, widen, zip, zip

Methods inherited from interface Functor

coerce

Field Details

INSTANCE

private static final Occurrences<?> INSTANCE

Constructor Details

Occurrences

private Occurrences()

Method Details

checkedApply

public Map<A,Long> checkedApply(Iterable<A> as)

Description copied from interface: Fn1

Invoke this function with the given argument, potentially throwing any Throwable.

Specified by:

checkedApply in interface Fn1<Iterable<A>, Map<A,Long>>

Parameters:

as - the argument

Returns:

the result of the function application

occurrences

public static <A> Occurrences<A> occurrences()

occurrences

public static <A> Map<A,Long> occurrences(Iterable<A> as)